Download T11033 - Boot-Up Problems: "Rx MGMT Key Only"

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Technical Update
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PH,TR,11033 – 6/2006
TROUBLESHOOTING
Equipment Type:
Phoenix Dialysis System
Subject:
Troubleshooting Boot-Up Problems:
“Rx MGMT Key Only”
From:
Gary Willis
PURPOSE:
To provide Phoenix service technicians with guidelines for troubleshooting problems
related to incomplete or incorrect boot-up.
SYMPTOM:
After completing boot-up, the IDLE screen has only the Rx MGMT Action Key with the red
Alarm Pictogram above it. The Navigation Tabs are unresponsive to touch. Typically, there
are no other visual or audible alarms. See Fig. 1 below.
CAUSE:
The Phoenix has booted-up in a condition where the Carrier (Main) CCA (circuit card
assembly) and program are not communicating with one or more of the Slave CCA’s. In this
condition, the main program halts (locks-up) and softkeys and keypads become
unresponsive. Conditions that can result in these symptoms are:
1. Poorly seated Slave or Carrier CCA - Data bus lines are physically interrupted,
preventing data from entering or leaving the Slave or Main CCA data bus.
2. Defective Slave or Carrier CCA - Slave or Carrier CCA is unable to communicate
correctly on the data bus.
3. Low 5 volt power supply - Data communication is dependent on 5V pulses. If the
5V power supply voltage falls too low, data can become corrupted or lost causing the
main program to generate communication alarms or to halt (lock-up) completely.
4. Defective Power Supply – A faulty alarm signal from the power supply can disable
normal communications from the slave and Main CCA’s.
5. Defective Compact Flash – A faulty compact flash, or one with corrupted data files,
can interfere with normal communication between slave CCA’s.
TROUBLESHOOTING:
1. With the main power OFF, reseat all CCA’s correctly in the card cage and turn the
main power ON.
2. If present, check that the +5VB/+5VD Jumper (6977953) is correctly installed.
3. With the main power ON, identify the communication LED’s on each card cage CCA
and observe that they are flashing normally. See Fig. 2 below. If necessary, compare
the LED’s with another Phoenix machine that is in IDLE and that is functioning
normally. Replace any CCA whose communication LED is not flashing correctly.
(Note: If the Protective and Carrier CCA are the only boards where the
communication LEDs are flashing, measure the voltage at J2-1 (PWFAIL) on
the Phoenix motherboard. Normal voltage is TTL High (2.7V-5.0V). If the
voltage is TTL Low then only the Protective and Carrier CCA communication
LEDs will flash, but at a rate slower than normal. Confirm the same
measurement at the power supply by disconnecting power supply connector J6
and measuring pin 1. If the voltage is still TTL Low, then replace the power
supply.)
4. Measure and verify that the 5V power supply voltages are within the specifications
indicated in Phoenix Service Manual: Maintenance, Section 8 – Calibrations, Power
Supply Verifications (4.9V – 5.3V). (Note: If the voltage falls much below 4.95V,
random communication errors may begin to be observed.) If the voltage is ≤
4.95V:
a. Verify connectivity of the Phoenix motherboard main power connector (J37).
Methods of improving the connection:
i. Install J37 Connector Locking Kit to stabilize connection. (P/N
6975114)
ii. Apply electrical connection enhancer (Stabilant 22) to connector
pins. (P/N 6975186)
iii. Install a +5VB/+5VD Jumper (6977953) on machines with a
transformer power supply.
iv. Replace J37 connector. (P/N 6976336)
b. Verify at the J37 connector that the unloaded voltages from the power supply
(J37 and J2 disconnected) are relatively close to the voltage specifications in
Phoenix Service Manual: Maintenance, Section 8 – Calibrations, Power
Supply Verifications. If not, the power supply may need to be replaced.
(Note: No specific specifications are provided for unloaded power supply
voltages. However, any voltage measurement that is significantly below
it’s loaded equivalent should be treated as suspicious.)
5.
Replace the Compact Flash and confirm that the Rx MGMT, SETUP, and ADR keys
are present after reboot. If only the SETUP key is not present, do an ADR Rinse and
confirm that the SETUP key returns.
Fig. 1
COMMUNICATION LED’S
CCA
LED
CARRIER
DL1
PROTECTIVE SLAVE
V9
BLOOD SLAVE
V50
HYDRAULIC SLAVE
V50
BIOSLAVE (6970362)
DL2
BIOSLAVE (6971055)
DL5
Fig. 2